50% (2008)

66% (2009)

57% (2005)

55% (2008)

40% (2007)

39% (2008)

53% (2009)

61% (2006)

47% (2006)

53% (2008)

45% (2008)

52% (2006)

50% (2005)

49% (2010)

49% (2005)

40% (2008)

43% (2006)

48% (2006)

47% (2008)

40% (2004)